Can you add your own units from existing factions to NCF? (for example, the ones in the screenshots) (some have already been taken from there, for example, elementals) (I just want to add new units without replacing the old ones)

In the Stronghold mod, when melee attack animations are played, creatures of levels 1, 2, 3, and 4 have a crucified body appear without arms, legs, or a head, and the weapon is lying next to it. It would be nice to improve the appearance of the gnoll models by increasing their size, making them wider and taller, because they seem very small and puny, like goblins. In my opinion, they are even smaller than peasants and archers.